KR20100128075A - Apparaus for manufacturing light guide plate - Google Patents

Apparaus for manufacturing light guide plate Download PDF

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Publication number
KR20100128075A
KR20100128075A KR1020090046516A KR20090046516A KR20100128075A KR 20100128075 A KR20100128075 A KR 20100128075A KR 1020090046516 A KR1020090046516 A KR 1020090046516A KR 20090046516 A KR20090046516 A KR 20090046516A KR 20100128075 A KR20100128075 A KR 20100128075A
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KR
South Korea
Prior art keywords
light guide
module
transparent plate
guide plate
manufacturing apparatus
Prior art date
Application number
KR1020090046516A
Other languages
Korean (ko)
Inventor
이세규
Original Assignee
이세규
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이세규 filed Critical 이세규
Priority to KR1020090046516A priority Critical patent/KR20100128075A/en
Publication of KR20100128075A publication Critical patent/KR20100128075A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Nonlinear Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The present invention relates to a light guide plate manufacturing apparatus for forming a light guide pattern by an inkjet printing method, the light guide plate manufacturing apparatus according to the present invention, a surface treatment module for activating the surface of the transparent plate; A pattern forming module for forming a light guide pattern using a UV curable paint on a surface of the transparent plate whose surface is activated by the surface treatment module; It includes; a curing module for curing by irradiating UV to the light guide pattern formed by the pattern forming module.

Description

Light guide plate manufacturing device {APPARAUS FOR MANUFACTURING LIGHT GUIDE PLATE}

The present invention relates to a light guide plate manufacturing apparatus, and more particularly, to a light guide plate manufacturing apparatus for forming a light guide pattern by an inkjet printing method.

Liquid Crystal Display is different from cathode ray tube, plasma display panel and field emission display. In order to visually represent an image, a light source is required. In such a liquid crystal display, a backlight unit is installed on a lower surface of the liquid crystal layer to irradiate a back surface of the liquid crystal layer.

In other words, the backlight unit is a device for uniformly irradiating the information display surface for use in a dark place to compensate for the disadvantage of being unable to use in a dark place. Therefore, the brightest light should be made with the minimum power.

In the backlight unit, various light sources are used. In general, fluorescent lamps such as CCFL and EEFL are commonly used. Recently, a technology using light emitting diodes (LEDs) has been developed, and the range of their use is gradually increasing. .

In the case of using the LED as a light source, generally, as shown in FIG. , 60), and a mold frame (not shown) for tying each of these parts into one unit.

Here, the light guide plate 10 is an optical material that guides the light flowing from the LED 20 attached to its side to the front side. In fact, the light path should have a change in medium. However, since there is no change in the light path inside the light guide plate 10, a dot pattern 12 different from the light guide plate forming material is printed on the surface of the light guide plate 10.

That is, the light guide plate 10 is formed by forming a dot pattern 12 on the lower surface of the light guide plate 10 using various methods. The dot pattern 12 contains very small glass beads and small grains. Therefore, most of the light introduced into the light guide plate 10 is scattered by the grains, and the light scattered by the grains is passed through the upper surface of the light guide plate 10 to the panel and eventually sensed by the user's naked eye.

In this case, only the light guide plate 10 on which the dot pattern 12 is formed is directly scattered, and thus the shape of the dot pattern 12 formed on the light guide plate 10 is reflected. The dot pattern 12 is a level that can be clearly detected even after the panel is mounted on the wick. In the related art, a process of minimizing or removing the reflection of the dot pattern is required, and the diffusion plate 40 may be used. The light luminance passing through the diffuser plate 40 rapidly decreases as diffusion occurs in both the horizontal and vertical directions perpendicular to the plane. The prism sheet is used to refocus this light to increase the light brightness, and generally two horizontal prism sheets 50 and 60 are used.

Of the components of the backlight unit, the light guide plate 10 changes a point light source emitted from the LED 20 to a surface light source, and its role is very important, and the dot pattern 12 is formed on the light guide plate 10. Technology is also known as the most difficult and complicated technology of the backlight unit manufacturing process.

As the method of forming the dot pattern 12 on the light guide plate 10, a method of fixing the light scattering ink by screen printing the injected light guide plate, or directly processing the pattern on the light guide plate is used. However, such a method has a disadvantage in that productivity is reduced due to an additional process generated after injection and it is difficult to form a fine pattern. In addition, recently, a method of injecting a light guide plate by mounting a stamper having an uneven surface formed on a mold has been used, but this also has a problem in that it takes too much cost to form a fine mold.

Therefore, there is an urgent need for the development of a technology capable of manufacturing an excellent light guide plate without requiring expensive costs. In particular, as the light guide plate becomes larger in area, this demand is further increased.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a light guide plate manufacturing apparatus which is suitable for manufacturing a large area light guide plate using inkjet printing technology and has excellent adhesion of a dot pattern after production.

Light guide plate manufacturing apparatus according to the present invention for achieving the above technical problem, the surface treatment module for activating the surface of the transparent plate; A pattern forming module for forming a light guide pattern using a UV curable paint on a surface of the transparent plate whose surface is activated by the surface treatment module; It includes; a curing module for curing by irradiating UV to the light guide pattern formed by the pattern forming module.

In the present invention, the surface treatment module is characterized by activating the surface of the transparent plate by spraying a plasma on the surface of the transparent plate.

The surface treatment module may include: an electrode unit disposed side by side at a predetermined interval between a plurality of electrodes coupled to a dielectric; A source gas introduction part provided in contact with an outer surface of an electrode provided on an outer side of the electrode, the source gas being introduced from the upper side, and communicating with the protruding heat sink from the lower side to discharge the source gas to the protruding heat sink side; A source gas supply path provided on an upper side of the electrode unit and a heat dissipation unit and providing a path through which the source gas passing through the heat dissipation unit is supplied to the electrode unit; And an intake and exhaust unit which is provided in separate spaces on the left and right sides of the source gas introduction unit, and at an upper portion thereof, a first gas passage connected to the outside, and a second gas passage connected to the outside thereof. It is characterized by.

The pattern forming module may include: a printer head unit forming a light guide pattern on the surface of the transparent plate; A UV paint supplier for supplying a UV curable paint to the printer head; And a control unit for controlling the printer head unit.

On the other hand, it is preferable that the light guide plate manufacturing apparatus which concerns on this invention is further provided with the film peeling module arrange | positioned in front of the said surface treatment module, and peeling the protective film attached to the said transparent plate material.

In addition, the alignment module is disposed between the surface treatment module and the pattern forming module, the alignment module for adjusting the position of the transparent plate material supplied to the pattern forming module is further provided.

The light guide plate manufacturing apparatus according to the present invention may further include an inspection module disposed behind the curing module and inspecting the light guide pattern formed on the transparent plate.

The light guide plate manufacturing apparatus may further include a film attachment module disposed behind the inspection module and attaching a protective film to a surface on which the light guide pattern is formed among surfaces of the transparent plate.

According to the present invention, since the dot pattern is formed using the inkjet printing method, the dot pattern can be formed very precisely and easily even in a large area light guide plate, and the surface of the transparent plate is activated by using atmospheric pressure plasma, so that the dot pattern is attached. This has a very good advantage.

Hereinafter, with reference to the accompanying drawings will be described in detail a specific embodiment of the present invention.

In the light guide plate manufacturing apparatus according to the present embodiment, as shown in FIG. 2, the loading unit 110, the surface treatment module 120, the transfer unit 130, the alignment module 140, the pattern forming module 150, and curing It is configured to include a module 160, the inspection module 170 and the unloading unit 180.

First, the loading unit 110 is a component that supplies the transparent plate 114 to the surface treatment module 120. As the transparent plate 114 used in the present embodiment, a plate of a plastic material having excellent light transmittance may be used, and for example, a PMMA plate may be used. As shown in FIG. 2, the loading unit 110 includes a suction chuck 115, a vertical driving unit 116, and a horizontal driving unit 117. First, the suction chuck 115 is a component that sucks the surface of the transparent plate 114 loaded on the plate mounting table 112 and drops it after moving to the transfer conveyor 122. For example, the adsorption chuck 115 may use a vacuum adsorption method.

Next, the vertical driving unit 116 and the horizontal driving unit 117 are components for driving the suction chuck 115 in two dimensions. First, the vertical drive unit 116 drives the suction chuck 115 in the vertical direction. Next, the horizontal driving unit 117 includes the suction chuck 115 to move the vertical driving unit 116 in the horizontal direction. In this way, the suction chuck 115 performs a two-dimensional motion by the combination of the horizontal drive unit 117 and the vertical drive unit 116.

Next, the film peeling module (not shown) is a component that peels off the protective film attached to the surface of the transparent plate 114. Since the transparent plate 114 is a material having excellent permeability, a defect occurs when foreign matter is attached to the surface or damage occurs on the surface. Therefore, a protective film is attached to the surface of the transparent plate 114 to prevent this. This protective film should be removed before the surface treatment process begins. The film peeling module is disposed before the surface treatment module 120 to remove the protective film attached to the surface of the transparent plate 114.

Of course, if the loading unit 110 supplies the transparent plate 114 with the protective film removed to the surface treatment module 120, the film peeling module may not be provided.

Next, the surface treatment module 120 is a component that activates the surface of the transparent plate 114 to increase the adhesion characteristics of the dot pattern. When the dope pattern is formed on the surface of the transparent plate 114 by an inkjet printing method, there is a problem that a defect occurs in that the dot pattern is separated from the transparent plate 114 after curing the dot pattern. In order to solve this problem, in the present invention, an atmospheric pressure plasma is generated and the plasma is sprayed onto the surface of the transparent plate 114 to activate the surface. When the dot pattern is formed on the activated transparent plate member 114, there is an advantage that the adhesion is significantly improved.

To this end, in the present embodiment, the surface treatment module 120 includes an electrode part, a source gas introduction part, a source gas supply path, and an intake and exhaust part. First, the electrode unit is a component in which a plurality of electrodes coupled to the dielectric are installed side by side at predetermined intervals. In this electrode portion, plasma is generated by a high voltage. The heat radiation portion is attached to the outside of the electrode portion. And the source gas introduction portion is provided in contact with the outer surface of the electrode provided on the outer side of the electrode, the source gas is introduced from the upper side, the lower side is in communication with the protruding heat sink is the source gas is discharged to the protruding heat sink side Component.

The source gas supply path is provided above the electrode part and the heat dissipation part, and is a component that provides a path through which the source gas passed through the heat dissipation part is supplied to the electrode part. In addition, the intake and exhaust parts are provided in separate spaces on the left and right sides of the source gas inlet, respectively, and have a structure in which a first gas passage is connected to the outside and a second gas passage is connected to the outside. . The plasma injected by the intake and exhaust unit and the gas generated in the surface treatment process are sucked out and discharged to the outside.

In the present embodiment, as shown in FIG. 2, the transparent plate 114 is surface treated while hitting the plasma sprayed by the surface treatment module 120 while being horizontally moved by the transfer conveyor 122. . Therefore, the surface treatment takes a very short time, there is an advantage that the surface treatment process has little effect on the overall process time.

Next, the transfer unit 130 is a component for transferring the transferred transparent plate 120 to the alignment module 140 after the surface treatment process. Since the structure of the transfer unit 130 is almost similar to the configuration of the loading unit 150 described above, it will not be repeated. Of course, if the surface treatment module 120 and the alignment module 140 is composed of the same plate conveying means, this conveying portion may not be provided.

Next, the alignment module 140 is disposed between the surface treatment module 120 and the pattern forming module 150 to adjust the position of the transparent plate 114 supplied to the pattern forming module 150. Element. The light guide pattern should be formed at the correct position on the transparent plate 114. Therefore, before forming the light guide pattern, the alignment module 140 accurately adjusts the position of the transparent plate member 114. The alignment module 140 may adjust the position by using a vision camera while moving the transparent plate two-dimensionally in the horizontal direction as in the general alignment apparatus.

Next, the pattern forming module 150 is a component that forms a light guide pattern using a UV curable paint on the surface of the transparent plate 114 having the surface activated by the surface treatment module 120. In this embodiment, the pattern forming module 150 forms a light guide pattern by inkjet printing. Accordingly, the light guide pattern can be formed very precisely even on a large area transparent plate by a simple method. To this end, in the present embodiment, as shown in Figure 2, the pattern forming module 150, the printer head portion 152. It comprises a UV paint supply unit 154 and the control unit 156.

First, the printer head portion 152 is a component that injects a UV curable paint to form a light guide pattern on the surface of the transparent plate 114. The printer head portion 152 may be composed of a plurality of heads arranged in a line, and has a precise nozzle to enable a very precise paint spraying operation. The head part 152 may form a light guide pattern on the transparent plate 114 while horizontally moving.

In addition, the UV paint supply unit 154 is a component that is connected to the printer head unit 152 to supply UV curable paint, and the control unit 156 is a component that controls the printer head unit 152. The printer head portion 152 is very important because the ink ejection amount and position movement must be controlled very precisely.

Next, the curing module 160 is a component that cures by irradiating UV to the light guide pattern formed by the pattern forming module 150. The curing module 160 may be provided at the rear of the pattern forming module 150, and may have a structure for curing UV paint on a transparent plate passing through the lower side by including a general UV lamp.

Next, the light guide plate manufacturing apparatus according to the present exemplary embodiment may further include an inspection module 170 disposed behind the curing module 160 and inspecting the light guide pattern formed on the transparent plate 114. The inspection module 170 inspects whether a defect occurs in the formed light guide pattern. The inspection module 170 may be configured with a general vision inspection apparatus.

And the light guide plate manufacturing apparatus according to this embodiment may be further provided with a film attachment module (not shown in the drawing). The film attachment module is disposed behind the inspection module 170 and is a component that attaches a protective film to a surface of the transparent plate member on which the light guide pattern is formed. The light guide pattern formed on the transparent plate 114 has a very sophisticated optical structure. Therefore, this light guide pattern must not be damaged or contaminated during handling. Therefore, immediately after production, a protective film is attached to protect it.

Finally, as shown in Figure 2, the unloading unit 180 is further provided. The unloading unit 180 discharges the manufactured transparent plate and serves to load or package the plate placement table 182. The specific configuration of the unloading unit 180 is substantially similar to that of the loading unit 110 described above, and thus will not be described here again.

1 is a cross-sectional view showing the structure of a backlight unit.

2 is a diagram illustrating a layout of a light guide plate manufacturing apparatus according to an embodiment of the present invention.

Claims (8)

A surface treatment module for activating the surface of the transparent plate; A pattern forming module for forming a light guide pattern using a UV curable paint on a surface of the transparent plate whose surface is activated by the surface treatment module; Light curing plate manufacturing apparatus comprising a; hardening module for curing by irradiating UV to the light guide pattern formed by the pattern forming module. The method of claim 1, wherein the surface treatment module, Light guide plate manufacturing apparatus characterized in that for activating the surface of the transparent plate by spraying a plasma on the surface of the transparent plate; The method of claim 2, wherein the surface treatment module, An electrode unit in which a plurality of electrodes coupled to the dielectric are installed side by side at predetermined intervals; A source gas introduction part provided in contact with an outer surface of an electrode provided on an outer side of the electrode, the source gas being introduced from the upper side, and communicating with the protruding heat sink from the lower side to discharge the source gas to the protruding heat sink side; A source gas supply path provided on an upper side of the electrode unit and a heat dissipation unit and providing a path through which the source gas passing through the heat dissipation unit is supplied to the electrode unit; And an intake and exhaust unit which is provided in separate spaces on the left and right sides of the source gas introduction unit, and at an upper portion thereof, a first gas passage connected to the outside, and a second gas passage connected to the outside thereof. Light guide plate manufacturing apparatus characterized in that. The method of claim 1, wherein the pattern forming module, A printer head portion forming a light guide pattern on the surface of the transparent plate; A UV paint supplier for supplying a UV curable paint to the printer head; The control unit for controlling the printer head portion; Light guide plate manufacturing apparatus comprising a. The method of claim 1, The light guide plate manufacturing apparatus which is arrange | positioned in front of the said surface treatment module, and further equipped with the film peeling module which peels the protective film attached to the said transparent plate material. The method of claim 1, The light guide plate manufacturing apparatus is disposed between the surface treatment module and the pattern forming module, the alignment module for adjusting the position of the transparent plate material supplied to the pattern forming module. The method of claim 1, The light guide plate manufacturing apparatus is disposed behind the curing module, the inspection module for inspecting the light guide pattern formed on the transparent plate material. The method of claim 7, wherein The light guide plate manufacturing apparatus is disposed behind the inspection module, and further provided with a film attachment module for attaching a protective film on the surface of the transparent plate member on which the light guide pattern is formed.
KR1020090046516A 2009-05-27 2009-05-27 Apparaus for manufacturing light guide plate KR20100128075A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101232359B1 (en) * 2011-11-03 2013-02-18 (주)코아시스템즈 Processing method for surface modifying of light guide plate for preventing deformation of light guide plate by heat of plasma
KR101232361B1 (en) * 2011-11-02 2013-02-18 (주)코아시스템즈 A carrier plate and processing method for surface modifying of the light guide plate using the same
CN103322435A (en) * 2012-03-22 2013-09-25 北京美科艺数码科技发展有限公司 Lighting device
KR101511609B1 (en) * 2014-02-18 2015-04-22 주식회사 모든기술 The apparatus for coating the panel
CN106597586A (en) * 2017-02-10 2017-04-26 中新科技集团股份有限公司 Manufacturing method of liquid crystal display diffusion plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101232361B1 (en) * 2011-11-02 2013-02-18 (주)코아시스템즈 A carrier plate and processing method for surface modifying of the light guide plate using the same
KR101232359B1 (en) * 2011-11-03 2013-02-18 (주)코아시스템즈 Processing method for surface modifying of light guide plate for preventing deformation of light guide plate by heat of plasma
CN103322435A (en) * 2012-03-22 2013-09-25 北京美科艺数码科技发展有限公司 Lighting device
KR101511609B1 (en) * 2014-02-18 2015-04-22 주식회사 모든기술 The apparatus for coating the panel
CN106597586A (en) * 2017-02-10 2017-04-26 中新科技集团股份有限公司 Manufacturing method of liquid crystal display diffusion plate

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